Investigation of the inhibitive effect of ortho-substituted anilines on corrosion of iron in 0.5 M H2 SO4 solutions
Khaled, Khaled F.; Hackerman, N.;
Abstract
The inhibiting action of six o-substituted anilines against the corrosion of iron (99.9999%) in solutions of sulphuric acid has been studied using potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). At inhibitor concentration range (10-3 to 10-2 M) in 0.5 M acid, the efficiency of the inhibitors increases in the order o-toluidine < 2-chloroaniline < 2-ethylaniline < 2-fluoroaniline < o-aminoanisole < 2-amiophenetole. Comparable results were obtained by the different electrochemical methods used. Adsorption of these compounds on the iron surface was found to obey a Langmuir adsorption isotherm. An equivalent circuit is suggested based on analysis of EIS data. © 2003 Elsevier B.V. All rights reserved.
Other data
Title | Investigation of the inhibitive effect of ortho-substituted anilines on corrosion of iron in 0.5 M H<inf>2</inf>SO<inf>4</inf> solutions | Authors | Khaled, Khaled F. ; Hackerman, N. | Keywords | Acid corrosion inhibition;Potentiodynamic polarization;Iron;EIS | Issue Date | 20-Dec-2003 | Journal | Materials Chemistry and Physics | ISSN | 02540584 | DOI | 10.1016/j.matchemphys.2003.08.007 | Scopus ID | 2-s2.0-0345377456 |
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